21603265241604 has 24 divisors (see below), whose sum is σ = 50412466540800. Its totient is φ = 7200395893344.

The previous prime is 21603265241603. The next prime is 21603265241611. The reversal of 21603265241604 is 40614256230612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21603265241603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86435079 + ... + 86684654.

It is an arithmetic number, because the mean of its divisors is an integer number (2100519439200).

Almost surely, 2^{21603265241604} is an apocalyptic number.

It is an amenable number.

21603265241604 is an abundant number, since it is smaller than the sum of its proper divisors (28809201299196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21603265241604 is a wasteful number, since it uses less digits than its factorization.

21603265241604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173130139 (or 173130137 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 21603265241604 in words is "twenty-one trillion, six hundred three billion, two hundred sixty-five million, two hundred forty-one thousand, six hundred four".